Data Item _pdbx_nmr_chem_shift_ref.external_ref_loc

General

Item name
_pdbx_nmr_chem_shift_ref.external_ref_loc
Category name
pdbx_nmr_chem_shift_ref
Attribute name
external_ref_loc
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

External chemical shift references are defined as either located within the sample (e.g., as a capillary) or external to the sample and are inserted into the spectrometer before, after, or both before and after the sample containing the molecular system studied in the entry.

Additional Descriptive Information for Depositors

 When external (capillary) is used as a referencing method, the location of the sample tube.

Item Example

 insert at center of experimental sample tube

Data Type

Data type code
line
Data type detail
char item types / multi-word items ...
Primitive data type code
char
Regular expression
[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*

Controlled Vocabulary

Allowed Value Details
insert at center of a separate sample tube
insert at center of experimental sample tube
insert at outer edge of a separate sample tube
insert at outer edge of experimental sample tube
other
separate tube (no insert) not similar to the experimental sample tube
separate tube (no insert) similar to the experimental sample tube

Controlled Vocabulary at Deposition

Allowed Value Details
insert at center of a separate sample tube
insert at center of experimental sample tube
insert at outer edge of a separate sample tube
insert at outer edge of experimental sample tube
other
separate tube (no insert) not similar to the experimental sample tube
separate tube (no insert) similar to the experimental sample tube